Method of making a coupling and valve assembly



J. V. MILO April 20, 1965 2 Sheets-Sheet 1 Original Filed May 28, 1959 Z z 0 4 f 4% A a a 1M. g m y & m \y///\/ ,7 w HM 6 1 1 INVENTOR. JusEPH V. MILD April 20, 1965 J. v. MILO 3,178,805

METHOD OF MAKING A COUPLING AND VALVE ASSEMBLY Original Filed May 28, 1959 2 Sheets-Sheet 2 INVENTOR. J n SEPH XI MILD United States Patent My invention relates to check valves particularly suitable for use in gasoline pump installations for holding the prime and more particularly to a novel method of making such valves.

This application is a division cf my co-pending application Serial No. 816,419, filed May 28, 1959, now US.

Patent 3,122,159.

There are available today coupling members or fittings which may be of varying lengths for coupling lines into tanks, pumps and other installations. Essentially, they consist of a short length of pipe threaded at each end and having end nuts threaded thereon. The end nuts are provided at one end with internally extending flanges. Between the ends of the pipe and the flanges are positioned gaskets and gasket retainers. When the pipes to be coupled are inserted in the opposite ends of the coupling or fitting, the end nuts are screwed up tight to force the gaskets against the pipes to provide a fluid tight joint. One end of the coupling, if it is on the intake or suction side of a pump, for example, may be coupled to a check valve. This, however, adds length to the intake line where space is at a premium, that is, under the pump.

It would be highly desirable to be able to have both the valve and coupling occupy no more space than the coupling alone and to have a combined coupling and valve which utilizes the standard coupling slightly modified if necessary and a valve assembly which can be readily incorporated in such coupling. This would eliminate the need of a separate valve housing and reduce costs of installation.

Utilizing a coupling and a valve in the intake requires two assemblies plus the labor of connecting two assemblies in any installation. Further, up to the present it has been necessary to cast the valve housing and valve support which, of course, adds to the cost of the valve.

At present, no simple structure has been evolved for making valve assemblies from available materials, such as bar stock and conventional elements.

It is an object of my invention to provide a novel method of making an improved check valve assembly which utilizes an optimum of stock elements such as coupling members or fittings (which may be slightly modified) and assembly bar stock.

In accordance with my invention, I provide a valve assembly made from stock parts and which can be inserted within a standard coupling or a coupling slightly modified to be positioned between the pipes being coupled together. In the preferred form of assembly, I provide an insert housing which is machined from bar stock. The upper part of the housing in either case is cylindrical in shape and provided with an O-ring or sealing member intermediate the ends of the cylindrical portion to provide a seal. The cylindrical form insures coaxial registration of the coupling housing and the valve assembly. The valve assembly utilizing stock items, includes a housing formed from bar stock by means of drilling and under cutting to form the housing as will be described in more detail below.

Referring to the drawings:

FIG. 1 is a side elevation of a combined coupling and valve assembly made according to my invention;

FIG. 2 is a vertical section of FIG. 1 showing details 3,178,805 Patented Apr. 20, 1965 of construction and a valve assembly made according to my invention;

FIG. 3 shows a modified form of the valve assembly shown in FIG. 2;

FIG. 4 is a vertical section of a piece of bar stock showing one step of my novel method of forming the insert for the valve assembly; and

FIGS. 5, 6 and 7 are sections showing further steps in the method of forming the valve housing insert according to my invention.

Referring to the drawings, FIGS. 1 and 2, a valve and coupling assembly made according to my invention includes the elongated tubular coupling housing It provided at its opposite ends with the threaded portions 11 coopcrating with the end nuts 12 threaded thereon and coupled to the conduits 14 received within the opposite ends of the coupling housing. On the inner walls of the threaded portions of the housing recessed bevels 15 are provided which cooperate with the gaskets 16 in contact with retainers 1'7 engaged by internally extending flanges 18 of the end nuts. When pipes or tubing 14 are received within the end of the housing, the end nuts are drawn up to force the gasket into fluid-tight engagement with the pipes or conduits.

In accordance with my invention, I provide a valve housing assembly including the valve housing 20 of cylindrical form which can be slid into the elongated housing. The pipe 14 received within the elongated housing may serve as a stop member for the valve housing assembly.

The periphery of the housing is provided with a recess 21 on which is mounted the O or sealing ring 22 which extends between the valve housing and the inner wall of the coupling housing. The comparatively short cylindrical housing 20 is provided with a cavity 25. On one side of the housing 20 I provide an opening and valve seat 26. The other surface is provided with a plurality of communicating passages 27 and a valve stem guide and opening support 28.

The valve assembly includes the head 30, stem 31 and biasing spring 32 which is positioned between the lower face of the valve housing and the end of the valve stem to bias the valve to closed position. The sealing ring 33 is retained between the washers 34 and 35.

In operation, when suction is caused above the valve, the valve rises and gasoline or other fluids may flow through the openings 27 and up through the valve seat. When the pump stops operation, the valve, of course, moves to closed position to provide the prime necessary.

The valve assembly shown in FIG. 3 may be substituted for the valve assembly shown in FIG. 2. The form shown in FIG. 2, however, is preferable. The prime numerals indicate similar parts.

In accordance with my invention, I also provide a novel method of forming a valve housing from bar stock. Referring now to FIGS. 4 to 7, inclusive, bar stock is cut to the desired length to provide a portion 46 having the desired depth for the housing. The first step involves drilling a recess 41 from one face of the stock. The second step, shown in FIG. 5, involves undercutting as shown in 42. Drilling is then followed from the opposite face or side of the member 40 to provide the apertures 43 and the valve stem opening and guide 44. These openings are then followed by a chamfering operation to provide the valve seat 45 and a machine operation to provide the annular recess 46 in which the O ring is provided.

From the above it will be seen that following the teachings of my invention, I am able to utilize a maximum of conventional and available parts to manufacture a combined coupling and valve assembly of simple design, which has all of the advantages pointed out above.

What is claimed is:

l. The method of making a valve assembly including a housing formed from cut bar stock comprising drilling a large cavity from one end of said stock and terminating intermediate the ends of said stock, undercutting said cavity to'form a larger cavity intermediate the ends of said stock, drilling a plurality of apertures from the other end of said stock to provide communicating passages into said larger cavity, drilling an aperture centrally positioned in said other end of said stock, forming, a valve ,7

- a plurality of apertures from the other end of said stock seat in said one end, and positioning a valve head and stem within the formed bar stock with the stern extending through said centrally positioned aperture and said head 7 adjacent said valve seat.

2. The method of making a valve asser'nbl'y including cutting a section of circular form from bar stock, drilling a circular cavity from oneIend of said section and terminating intermediate the ends of said stock, undercutting said cavity to form a larger cavity intermediate the ends of said section, drilling a plurality of apertures from the other end of said section to provide'communicating passages into said larger cavity, forming a valve ,seat in said one end, and positioning a valve head and stem within the section with the stem extending through onev of said plurality of apertures and said head adjacent said valve seat.

3. The method of making a valve assemhly includingcutting a section of circular-form from bar stock, drilling,

a circular cavity from one face of said stock, and terminating intermediate the endsof said stock, undercut: ting said cavity to form a larger cavity intermediate'the.

opposite faces of said section, drilling a plurality of I apertures from-the other face of said section to provide communicating passages into said larger cavity, drilling, an aperture centrally positioned in said other face of said undercutting said cavity to form a larger cavity intermediate the opposite faces of said section, drilling a plurality of apertures from the other. face of said section to provide communicating passages into said larger cavity, forming a valve seat in said circular cavity, and positioning a valve head and stem within the section with the stein 4 1 extending through one of said plurality of apertures and said head adjacent said valve seat.

5. The method of making a valve assembly having a housing, including cutting a section from'bar stock for a valve housing, drilling a circular cavity extending from vone end of said section andterminating intermediate the ends of said stock, undercutting said cavity to form a larger cavity intermediate the ends of said section, drilling to provide communicating passages into said larger cavity, drilling an aperture centrally positioned in said other end of said stock, forming a valve seat in said one end in said large cavity, positioning a valve head and stem within the formed bar stock withthe stem extending through said centrally positioned aperture and said head adjacent said valve seat, forming a recess around the perimeter of said housing and mounting a sealing ring within said housing. 6. The method of making a valve assembly having a housing, including cutting a section of comparatively flat circular form from bar stock for a valve housing, drilling a circular cavity extending from one end of said section, f undercutting said cavity to form a larger cavity intermediate the ends of said section, 'drillinga plurality of aper: tures from the other end of s'aidstock to provide communicating passages into said larger cavity, drilling an aperture centrally positioned in said other end of said stock, forming a valve seat in said, one end in said large cavity, positioning a valve head and stem within the formed bar stock with'the stem extending through said centrally positioned aperture and said head adjacent said valve seat, forming a recess around the perimeter of said, housing and'mounting' a sealing ring within said housing.

References Cited by the Examiner UNITED STATES PATENTS WHITMORE A. WILTZ, Primary Examiner.

JOHN F, CAMPBELL, Examiner. 

1. THE METHOD OF MAKING A VALVE ASSEMBLY INCLUDING A HOUSING FORMED FROM CUT BAR STOCK COMPRISING DRILLING A LARGE CAVITY FROM ONE END OF SAID STOCK AND TERMINATING INTERMEDIATE THE ENDS OF SAID STOCK, UNDERCUTTING SAID CAVITY TO FORM A LARGER CAVITY INTERMEDIATE THE ENDS OF SAID STOCK, DRILLING A PLURALITY OF APERTURES FROM THE OTHER END OF SAID STOCK TO PROVIDE COMMUNICATING PASSAGES INTO SAID LARGER CAVITY, DRILLING AN APERTURE CENTRALLY POSITIONED IN SAID OTHER END OF SAID STACK, FORMING A VALVE SEAT IN SAID ONE END, AND POSITIONING A VALVE HEAD AND STEM WITHIN THE FORMED BAR STOCK WITH THE STEM EXTENDING THROUGH SAID CENTRALLY POSITIONED APERTURE AND SAID HEAD ADJACENT SAID VALVE SEAT. 